<template>
<div class="login_container">
    <div class="login_box">
        <div class="avatar_box">
            <img src="../assets/logo.png" alt="" />
        </div>

        <el-form :model="loginForm" :rules="loginFormRules" ref="loginFormRef" label-width="60px" class="login_form">
            <el-form-item prop="username" label="账户">
                <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
            </el-form-item>
            <el-form-item prop="password" label="密码">
                <el-input v-model="loginForm.password" prefix-icon="iconfont icon-3702mima" type="password"></el-input>
            </el-form-item>
            <el-form-item class="btns">
                <el-button type="primary" @click="login">登录</el-button>
                <el-button type="info" @click="resetLoginForm">重置</el-button>
            </el-form-item>
        </el-form>
    </div>
</div>
</template>

<script>
export default {
    data() {
        return {
            // 登录表单的数据对象
            loginForm: {
                username: '',
                password: ''
            },
            // 表单验证规则对象
            loginFormRules: {
                // 验证用户名
                username: [{
                        required: true,
                        message: '请输入用户名称',
                        trigger: 'blur'
                    }, ,
                    {
                        min: 3,
                        max: 10,
                        message: '长度在3-10个字符之间',
                        trigger: 'blur'
                    }
                ],
                // 验证密码
                password: [{
                        required: true,
                        message: '请输入密码',
                        trigger: 'blur'
                    },
                    {
                        min: 6,
                        max: 15,
                        message: '长度在6-15个字符之间',
                        trigger: 'blur'
                    }
                ]
            }
        }
    },
    methods: {
        // 重置登录表单
        resetLoginForm() {
            this.$refs.loginFormRef.resetFields()
        },
        // 登录预验证
        login() {
            this.$refs.loginFormRef.validate(async valid => {
                if (!valid) return
                const {
                    data: res
                } = await this.$http.post('login', this.loginForm)
                if (res.meta.status !== 200) return this.$message.error('登入失败')
                this.$message.success('登陆成功')
                // 将服务器生成的token保存到客户端的sessionStorage中
                window.sessionStorage.setItem('token', res.data.token)
                // 通过编程式导航跳转到home页面
                this.$router.push('/home')
            })
        }
    }
}
</script>

<style lang="less" scoped>
.login_container {
    background-color: #e5e5e5;
    height: 100%;
}

.login_box {
    width: 450px;
    height: 300px;
    border-radius: 5px;
    background-color: #f9f9f9;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);

    .avatar_box {
        width: 130px;
        height: 130px;
        border: 1px solid #e5e5e5;
        border-radius: 50%;
        padding: 10px;
        box-shadow: 0 0 10px #ddd;
        position: absolute;
        left: 50%;
        transform: translate(-50%, -50%);
        background-color: #fff;

        img {
            width: 100%;
            height: 100%;
            border-radius: 50%;
            background-color: #eee;
        }
    }

    .login_form {
        position: absolute;
        bottom: 0;
        width: 100%;
        padding: 0 25px;
        box-sizing: border-box;
    }
}

.btns {
    display: flex;
    justify-content: flex-end;
}
</style>
